Abstract: A method and system analog beamforming for a single-connected antenna array is herein disclosed. A method includes estimating analog channels on a per-antenna basis, calculating explicitly an analog beamforming matrix based on the estimated analog channels, and performing analog beamforming based on the calculated analog beamforming matrix.

Abstract: A method in a network node for Multiple Input Multiple Output (MIMO) is provided. The method comprises: obtaining a precoding matrix indicator (PMI) for a first codebook for use in a Single User Multiple Input Multiple Output (SU-MIMO) transmission; determining a precoding matrix for a second codebook, based on the obtained precoding matrix indicator; and selecting the determined precoding matrix for the second codebook in response to determining that an User Equipment (UE) is scheduled for a Multi-User (MU)-MIMO transmission. A network node for performing this method is also provided.

Abstract: A signal receiving device may not need to consider jitter characteristics of a received signal by including a transition detecting device which receives first to third input signals having different signal levels for each unit interval, compares whether a signal level of a first differential signal, which is a differential signal between the first input signal and the second input signal among the first to third input signals, is greater than a first reference signal level to output a first comparison signal, and compares whether the signal level of the first differential signal is greater than a second reference signal level different from the first reference signal level to output a second comparison signal, and a clock data recovering device which recovers a clock signal embedded in the first to third input signals on the basis of the first and second comparison signals to output the recovery clock signal.

Abstract: A wireless communication network configured to share a wireless resource block that comprises a same time interval and a same radio subcarrier. The wireless communication network comprises network circuitry and transceiver circuitry. The network circuitry determines UE locations and determines UE correlation factors between the UEs based on the UE locations. The network circuitry associates the UE correlation factors with Three-Dimensional (3D) geographic containers based on the first UE locations and generates container correlation factors for the Three-Dimensional (3D) geographic containers responsive to the associations. The network circuitry selects UEs for the shared wireless resource block. The transceiver circuitry wirelessly transfers user data to the selected UEs over the shared wireless resource block that comprises the same time interval and the same radio subcarrier.

Abstract: A method may include receiving, from a network node, association and configuration information for a plurality of sequences, where each sequence may be associated to at least one network-node beam or beam-pair link. The method may also include performing beam measurements of beams from the network node to obtain beam measurement information. The method may further include detecting beam misalignment of the beam based on the beam measurement information. In addition, the method may include transmitting a sequence among the plurality of sequences to the network node to inform the network node of the beam misalignment, and to trigger the network node to start a beam adjustment procedure and a monitoring procedure for a configured-grant configuration. Further, the method may include, after transmitting the sequence, considering the indicated preferred beam as a new serving beam, and switching to the configured-grant configuration associated with this new serving beam.

Abstract: An ultra-wideband (UWB) beam forming system is disclosed. In one or more embodiments, the UWB beam forming system includes a plurality of radiating elements forming a circular, cylindrical, conical, spherical, or multi-faceted array and a beamformer coupled to the radiating elements. The beamformer includes one or more transformable reconfigurable integrated units (TRIUNs) configured to independently control individual radiating elements or groups of radiating elements of the plurality of radiating elements.

Abstract: A digital circuit for implementing a channel-tracking functionality, in which an adaptive (e.g., FIR) filter is updated based on reinforcement learning. In an example embodiment, the adaptive filter may be updated using an LMS-type algorithm. The digital circuit may also include an electronic controller configured to change the convergence coefficient of the LMS algorithm using a selection policy learned by applying a reinforcement-learning technique and based on residual errors and channel estimates received over a sequence of iterations. In some embodiments, the electronic controller may include an artificial neural network. An example embodiment of the digital circuit is advantageously capable of providing improved performance after the learning phase, e.g., for communication channels exhibiting variable dynamicity patterns, such as those associated with aerial copper cables or some wireless channels.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may detect that a trigger condition is satisfied based at least in part on a motion sensor signal of the UE. The UE may trigger or transmit an update to a parameter for sidelink beam management based at least in part on the trigger condition being satisfied, wherein the UE is a transmitter of a synchronization signal used for the sidelink beam management, or a receiver of the synchronization signal transmitted by another UE used for the sidelink beam management. Numerous other aspects are provided.

Abstract: An ultra-wideband (“UWB”) communication system comprising a transmitter having two transmit antennas and a receiver having a single receive antenna. Respective selected portions of the UWB signal are transmitted by the transmitter via each of transmit antennas is received at the receive antenna. By comparing the phases of the received signal portions, the phase difference of departure can be determined. From this phase difference and the known distance, d, between the transmit antennas, the Cartesian (x, y) location of the transmitter relative to the receiver can be directly determined.

Abstract: A method and apparatus are provided for generating a channel state information report. A set of reference signals transmitted from a base station are received, and a set of beams are identified based on the set of reference signals. The set of reference signals is transformed to obtain a set of vectors of amplitude and phase coefficients of a compressed codebook, each amplitude coefficient vector and phase coefficient vector corresponding to an identified beam in the set of beams. The amplitude coefficient vector for each identified beam in the set of beams is adjusted by a selected value, wherein the selected value is determined such that the amplitude coefficient vector corresponding to a particular beam is normalized to a known predetermined value. A predefined oversampling factor is set to a subset of the set of beams to a value greater than one, wherein the particular beam is excluded from the subset of beams.

Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes data acquisition circuitry configured to generate magnetic resonance data; a digital encoder connected to receive the magnetic resonance data and configured to digitally encode the magnetic resonance data using an encoding scheme having a spectral null approximately at the Larmor frequency; and an electric data transmission line connected to transmit the digitally encoded magnetic resonance data.

Abstract: A method and system provides for execution of calibration cycles from time to time during normal operation of the communication channel. A calibration cycle includes de-coupling the normal data source from the transmitter and supplying a calibration pattern in its place. The calibration pattern is received from the communication link using the receiver on the second component. A calibrated value of a parameter of the communication channel is determined in response to the received calibration pattern. The steps involved in calibration cycles can be reordered to account for utilization patterns of the communication channel. For bidirectional links, calibration cycles are executed which include the step of storing received calibration patterns on the second component, and retransmitting such calibration patterns back to the first component for use in adjusting parameters of the channel at first component.

Abstract: A system for clock calibration is described herein which comprises a serializer configured to convert an input data stream in parallel format to provide an out data stream in a serial format; a clock source configured to generate one or more clock signals; a first frequency divider configured to provide at least one divided clock signal of the one or more clock signals; a delay line configured to delay at least one divided clock signal; and a clock calibrator configured to control delay of the at least one divided clock signal at the delay line to adjust the one or more divided clock signals at a fixed relationship with respect to the one or more clock signals based on voltage and temperature variation.

Abstract: A processing unit processes an input signal from an external apparatus and includes a first terminal to which a reference voltage is input from the external apparatus, a second terminal to which a first pulse signal having a first frequency is input from the external apparatus, and a control portion to process the input signal. A memory stores data to be transmitted to the external apparatus, and a clock generating unit generates a clock signal having a higher frequency than the first frequency of the first pulse signal. To transmit a data signal to the external apparatus from the processing unit, the control portion switches a load between the first terminal and the second terminal based on the data stored in the memory during a period in which a second pulse signal having a second frequency lower than the first frequency is input from the external apparatus.

Abstract: A digital circuit for implementing a channel-tracking functionality, in which an adaptive (e.g., FIR) filter is updated based on reinforcement learning. In an example embodiment, the adaptive filter may be updated using an LMS-type algorithm. The digital circuit may also include an electronic controller configured to change the convergence coefficient of the LMS algorithm using a selection policy learned by applying a reinforcement-learning technique and based on residual errors and channel estimates received over a sequence of iterations. In some embodiments, the electronic controller may include an artificial neural network. An example embodiment of the digital circuit is advantageously capable of providing improved performance after the learning phase, e.g., for communication channels exhibiting variable dynamicity patterns, such as those associated with aerial copper cables or some wireless channels.

Abstract: A controller for use in a power converter including a jitter generator circuit coupled to receive a drive signal from a switch controller and generate a jitter signal. The jitter signal is a modulated jitter signal when the drive signal is below a first threshold frequency. The switch controller is coupled to a power switch coupled to an energy transfer element. The switch controller is coupled to receive a current sense signal representative of a current through the power switch. The switch controller is coupled to generate the drive signal to control switching of the power switch in response to the current sense signal and the jitter signal to control a transfer of energy from an input of the power converter to an output of the power converter.

Abstract: Preventing RF signal distortion and signal error producing memory events in a Radio Frequency (RF) power amplifier (RFPA). An element, disposed prior to the Radio Frequency (RF) power amplifier (RFPA) in a signal path of a RF signal input to the RFPA, may enforce a maximum allowable amplitude in a high PAPR instantaneous high peak of the RF signal. An element may also increase or supplement a bias of the Radio Frequency (RF) power amplifier (RFPA) when a high PAPR instantaneous high peak is detected in the RF signal prior to receipt by the RFPA. Additionally, a first element operable detects when an instantaneous output voltage of the Radio Frequency (RF) power amplifier (RFPA) is below a predetermined voltage, and in response, a second element supplies additional current to prevent the output voltage of the RFPA from falling below a predetermined threshold voltage.

Abstract: The present disclosure provides a signal calibration method, apparatus and device generated based on an imbalance of I path and Q path. The method includes sending a cosine signal and a sine signal through a signal generator, transmitting the cosine signal and the sine signal in the I path and the Q path respectively, the cosine signal and the sine signal being configured to loop back to a signal receiving direction after passing through a transmitting amplifier; processing a signal obtained by a down converter in the signal receiving direction; performing a phase adjustment and an amplitude adjustment by adjusting the signal generator, gain amplifiers of I path and Q path analog domains, and a corresponding digital domain, so as to determine an appropriate phase cancellation value and an appropriate amplitude cancellation value for an image signal; and calibrating the image signal corresponding to the signal to be calibrated.

Abstract: Systems/methods comprising a plurality of devices that cooperate with one another, particularly when in proximity to one another, are disclosed. According to some embodiments, first information is relayed from a first device to a second device and second information is relayed from the second device to the first device. The second device may transmit a signal, comprising the first information, to a destination device; and the first device may transmit a signal, comprising the second information, to the destination device. A plethora of embodiments are disclosed including a new carrier aggregation system/method that capitalizes on resources that may be provided by a plurality of devices that cooperate with one another.

Abstract: The invention relates to an apparatus for selecting candidates in a K-Best algorithm of a MIMO decoder. The K-Best algorithm uses a layered structure comprising a first layer and subsequent layers. In each subsequent layer 2L candidates are selected by iteratively carrying out a selection step, wherein in the selection step the apparatus is configured to calculate and select at least two candidates having minimum distance values of a candidate group, and after each iteratively carried out selection step, the selected at least two candidates are sent to a further subsequent layer for iteratively generating a further candidate group of 2L candidates in the further subsequent layer.